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GM7HUD > TECHNI 19.08.04 15:24l 35 Lines 1415 Bytes #999 (0) @ WW
BID : 75010_GB7ESX
Read: GUEST
Subj: Re: Re^2: Car Battery Confusion
Path: DB0FHN<DB0RGB<OK0PPL<DB0RES<ON0AR<7M3TJZ<ZL2TZE<GB7YFS<GB7MAX<GB7ESX
Sent: 040819/1248z 75010@GB7ESX.#31.GBR.EU $:75010_GB7ESX [Witham, Esx]NNA V3.1
Jeff G4XNH wrote:
>
>but I strongly suggest
>to you that the alternator would suply nothing like 50 to 60 amps! In your
>dreams maybe. I would be fairly surprised if even a modern car alternator
>would supply that much.
Jeff, when in a hole, stop digging. Do not break out the JCB :-)
My XLY's supermini alternator loafs along producing 55A on a 1.2Ltr engined
car. My car alternator is a 90A unit. Super luxury cars have bigger alternators.
Just put your brain into gear for a moment and think. If the alternator
couldnt provide the current for the lamps (never mind the HRW, sunroof,
fans, wipers, windows, heated seats, ICE, yada yada yada) then our cars would
havea range measured in miles. We wouldn't stop when we ran out
of petrol, but when the battery gave up because the alternator cant provide
the current.
The battery on a car provides the starting current and the instantaneous peak
current when items are switched on.
My car has a 45AHr battery. My headlamps use about 10A. If the battery
powered them alone, the battery would last for (simplisticly) for 4.5Hr.
Given it takes me 5 hours to drive to my mothers house and I've done that
the headlmaps on all the time at night, the current must come from somewhere.
If it isnt coming from the alternator, and teh battery seems as fresh at the
end as at the start....
...where does the current come from to drive the lamps?
73 de Andy GM7HUD
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